Double-pole switch



A. H. BATES DOUBLE POLE SWITCH 4 Filed April l8, 1923 he s sheet 1 May 26, 1925.

A. H. BATES DOUBLE POLE SWITCH Filed April 18 192.5 2 Sheets-Sheet 2 Patented May 26, 1925.

UNITED STATES 1,588,882 PATENT OFFICE.

ALBERT H. BATES, OF ELGIN, ILLINOIS, ASSIGNOR TO THE HOOVER COMPANY, A CORPORATION OF OHIO.

DOUBLE-POLE SWITCH.

Application filed April 18, 1923. Serial No.632,921.

To all whom it may concern:

Be it known that I, ALBERT H. BATES, a citizen of the United States, and a resident of Elgin, in the county of Kane and State of Illinois, have invented anew and useful Improvement in Double-Pole Switches, of which the following is a full, clear, and exact description.

My invention relates to improvements in snap action switches, and in particular to that type of switch disclosed in mg application, Serial No. 579,803, filed ugust 5, 1922.

An object of my invention is the provision of a simple and sturdy switch mechanism having improved mechanical and electrical characteristics which add to the safety and reliability of operation.

Other objects will appearfrom the following detail description and in the claims appended thereto.

In the accompanying drawings,

Figure l is a top plan view of my switchwith'the plunger mechanism and the cover capremoved,

Figure 2 is an axial cross section taken on the line a2w of Fig. 1, showing the switch in closed position,

Figm 3 is a fragmentary sectional view taken on the line ac-w of Fig. 1 showing the switch in open position,

Figure 4 is a side elevational view part broken away to show a sectional view of the mechanism on the line yy of Fig. 1,

Figure 5 is a sectional view taken on the line 22 of Fig. 1,

Figure 6 is a detail View.

In the embodiment of my improved switch, as illustrated in the accompanying drawings, I have provided the supporting base 10 of insulating material, such as porcelain, which is formed with a central aperture 11 in which a switch mechanism is mounted. The porcelain base is further provided with suitable apertures 12 which act as conduits for the lead-in wires (not shown). The base 10 is also provided with apertures 13, through which extend screws 14. These screws are received in screw threaded metal blocks 15 which act as nuts and clamp to the top of the base 10 the resilient contact members 16. The upper end of the screw 14 receives slotted nuts 17 which are adapted to secure the terminals of the lead-in wires by clamping them to the jections 27-27, the

blocks 15-15, the latter being provided with an upturned edge 18 which tends to hold the terminal wire in proper position.

At diametrically opposite points the base 10 is provided with upstanding post-portions 19-19, each provided with an aperture through which extends a securing bolt 20 and a nut 21, the latter being housed in a counterbore 22 at the bottom of the base. This bolt and nut secured to the post-portions of the base 10 an assemblage which consists of a snap action mechanism and a plunger mechanism adapted to ,cooperate therewith. The snap action mechanism is suspended within the central aperture of the base 10 by means of a U-shaped member 23 which is provided with horizontally. disposed ends 2f1-2 1 which rest upon the postportions 19-19 and have screw-threaded apertures which receive the bolts 2020. The side arms of the U-shaped member support a shaft 25 and a second shaft 26 directly beneath the first one. The side arms are also provided with inwardly facing propurpose of which will be described later.

Mounted on the shaft 25 are the cams 28-28 which are connected at one side by an integral portion 29 in order to stiffen and maintain the cams in proper registry. Each cam is provided'with a wedge-shaped upper end having side faces -30 which meet at the point 31 and terminate at the other ends 7 in the shoulders 32.

Beneath the shaft 25 each cam is provided with an arcuate slot 33, through which passes the shaft 26 upon which is mounted of the pole piece swing outside of the cams 28-28 and have their range of movement limited by the stops 2727 formed on the side arms of the support member 23. The bottom of the U-shaped pole piece is perforated as at 35 and has extending therethrough a guide member 36, the upper end of which is formed with a head 37 having integral lugs 38 which are pivotally mounted in holes 39-39 formed in the cams. Surrounding the pole piece 34 and abutting the head 37 and the bottom of the pole piece is a coiled compression spring 40. Each side of the U-shaped pole piece carries a substantially triangular shaped member 41 made of non-conducting material, such as vulcanized fiber which is secured thereto by any the U-shapedpole piece 34. The side arms such as the rivets 4H2.

The ends of the members il- L1 are, held I in spaced relation by the tubular metallic members 43-43 and the assemblage is held together by means of rivets 4147-44: which project through the members 4141 and frictionally engage the interiors of the tubular members 43- 43 and are formed with convex heads 45-45 which act as the movable contacts of the switch.

Mounted upon the horizontally disposed ends of the U-shaped supporting member 23 and secured thereto by means of the bolt 20 is the plunger mechanism which is adapted to cooperate with the snap actionv mechanism, just described. This plunger mechanism comprises the supporting member 46 rovided on diametrically opposite sides with laterally extendingears L7, which are apertured to receiie the bolt 20 and with a convenient means,

7 central aperture 48 having an upturned edge 49 which forms the seat for the coil compression springi Resting upon the supporting member 46 and having laterally extending apertured ears 50--50 which receive the bolts 20-20, is a cylindrical guide member provided with screw threads 51 at its upper end. This guide member is also provided with vertical slots 52-52, which receive out-turned lugs 53'53 formed upon the plunger 54 which is adapted to move up and down in the guide member. In the upper end of the lunger a metal disk 55 is forced to which is attached a resilient tongue 56, which terminates in a loop 57 adapted to cooperate with the faces of the cams 2828. The compression spring 58, the lower end of which rests upon the support member 46 abuts at the other end of the disk .55 and normally tends to hold the plunger in the uppermost position.

In order to protect this switch and enhance the appearance thereof, a housing has been provided which is lined with insulation 59 and which is secured to the mechanism by means of screw threaded ring 60 cooperating with the screw threads at the upper end of the guide member.

1. In a snap action mechanism, a pole piece comprising a U-shaped actuated member p1votally mounted adjacent the free end of the side arms thereof, a non-conducting member secured to and carried by each side arm and contact members carried by the ends of said non-conducting members which hold them in spaced rotation.

2. In a switch, a snap action mechanism comprising a supporting frame having side arms, an oscillable actuating member and an oscillable actuated member, both pivotally mounted between said side arms, a nonconducting member secured substantially at right angles to said actuated member an contact members carried at each end of said non-conducting member.

3. In a switch, a circuit closing member comprising spaced non-conducting arms, a metallic spacer therebetween, and means securing the whole together, comprising a rivet-like member, the heads forming contacts and the shanks extending thru the nonconducting arms and secured in the metallic spacer.

Signed at Chicago, and State of Illinois, 1923.

in the county of Cook this 16th day of April,

ALBERT H. BATES. 

